Jonathan boothman



(ModeL).

Patented Sept; 17, 1895.

' FIG-.1.

Fig.5.

JONATHAN BOOTHMA N, OF MANCHESTER, ENGLAND.

CUTTER FOR NAIL MAKINGAND DRIVING MACHINES.

SPECIFICATION forming part of Letters Patent No. 546,577, datedSeptember 17, 1895. Application filed. May 11, 189{l. Serial No. 51a9odem To all whom it mayconcern: I

Be it known that I, JONATHAN BOOTHMAN,

that a portion of the parallel wire is severed slantwise, so as to leavethe nail pointed. In such a machine there is a fixed cutter having twogrooves, and opposite thereto is a reciprocating cutter having a singlegroove. The stroke of the reciprocating cutter (which is operated by acam) is such that its groove is in juxtaposition first with one grooveand then with the other groove of the fixed cutter. In one position thegroove in the fixed cutter and that in the reciprocating cutter togetherform a passage for the reception of the end of the continuous length ofwire. Part of the wire is held by the groove in the fixed cutter andpart by the groove in the sliding cutter. When the latter slides pastthe former, it takes with it the short length destined to form the nail(which is severed and pointed by the cutting-edges of the fixed cutter)and brings it to the second groove of the fixed cutter, through whichworks the driver to drive the shaped nail into the work held underneath.The reciprocating cutter thus acts simply as a holder and conveyer ofthe In the drawings, Figure 1 is a sectional front elevation through thecutter-box, showing the acting end of the fixed cutter as seen when thereciprocating or carrying cutter is removed. A represents the continuouslength of wire. B represents the driver. Fig. 2 is a sectional planthrough a: y of Fig. 1 with the reciprocating cutter in the position inwhich it receives the wire from which the nail is to be cut. Fig. 3 is atransverse section through line w'yof Fig. 2. Fig. etshows sideelevation of the middle sections of the fixed cutter. Fig. 5 is a planshowing the mode I adopt of securing the tool or cutter inthereciprocating cutter-box.

In all the figures the same letters of reference refer to the sameparts.

0 is the cutter-box, which holds the fixed cutters and which is providedwith a through passage 0, in which the reciprocating cutterbox D slidesto and fro.

Referring first to the fixed cutter, the side sections ct aare cut awayat a a on their inner faces adjacent to the center section b, in orderto form the two sides of the grooves to receive the wire. The third sideof each groove is formed by the center section b, which is so set thatits front face lies in the same plane as the faces of the side sections.One edge b of the end face of the center section forms the cutting-edge,which points the nail as it is carried past the said cuttingedge by thetravel of the reciprocating or carrying cutter. The center section b issimply a prismatic bar, and to sharpen the cutting-edge b it is merelynecessary to withdraw it and grind the front edge or face.

' The upper section 0 is a square bar, the under edge 0' of which actsas a cutting-edge to sever the length of wire destined to form the nailfrom the continuous length of wire while the nail. is being borneforward to the drivinggroove by the stroke of the reciprocating orcarryingcutter. To sharpen the cutting-edge of the section 0, it ismerely necessary todisplace it longitudinally loy'pushing it forward,when a fresh length of the cutting-edge comes into action. When all ofone edge is worn off, the bar is turned over a quarter-turn, presentinga fresh square edge. The bar being square has four such edges, whichlast along time before the bar need be replaced or reground.

The side sections a are preferably made double-ended 0r reversible. Thegrooves in the opposite ends are made of different sizes, so that oneset of side sections may be used for two sizes of wire.

As may be seen in plan in Fig. 2, the side sections a are recessed intothe cutter-box O. The center section is made a good driving fit, so thatwhen driven up it keys the side sections and prevents longitudinal ortransverse displacement. The fore end 0 of the upper section 0 projectsthrough a square hole in the front of the cutter-box. A pinchingscrew(Z, passing through the bottom of the cutter-box and taking against theunder side of the middle section b, prevents the sections 1) and c fromshifting.

The present method of securing the grooved tool in the reciprocatingcutter-bar is by fitting it accurately into a dovetailed groove. This,however, presents obstacles to ready renewal.

I secure the grooved tool 0 in a recess undercut at c by means of a nute and clamping-screw a The nut is undercut at c and as it bears with asquare edge at 6 against the cutter-holder the tightening of the screw 0causes the nut e to securely clamp the tool in the bar.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a fixed cutter for a nail cutting and driving machine thecombination of the two side sections a a each notched to form a groovefor receiving the nail with a removable center section b substantiallyas and for the purpose set forth.

2. The combination of the side sections a a the center section b and thetop section 0 the whole forming a fixed cutter for a wire nail cuttingand driving machine substantially as set forth.

3. A combination cutter for a nail cutting and driving machine havingreversible side sections provided with grooves at both ends forreceiving two sizes of wire substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JONATHAN BOO'IIIMAN.

Witnesses:

G. P. ROWLEY, W. J. Nonwoon.

